Shaun, Father of Synths
From Fallout set
Shaun, Father of Synths
Legendary Creature — Human Scientist
3/4
Whenever you attack, you may create a tapped and attacking token that's a copy of target attacking legendary creature you control other than Shaun, except it's not legendary and it's a Synth artifact creature in addition to its other types.
When Shaun leaves the battlefield, exile all Synth tokens you control.